Explanation of Leap Day It's an ancient tradition of unknown origins. The Kihb'ole people came from planet Zivf with tales of a creature of great magical power who already refused to eat mushrooms on leap day. An even more detailed story of planet Zivf (which contrasts with the time travelling galaxy unbound movement of fish in free space that is the basis of the mechanics of the "Widralg drive", the way the Kihb'oles' spaceships swim) says that an original beer dog-like forest went mental on leap day of the most sacred year of the Yyy religion. This event has never been proven, but it is a common and recurring legend and so we can't just go past over it. The sanitarium expedition has been reported in at least 3 songs and these are the sources of everything we know: the reason of why all the plasma-cathodic wood crosses were left untouched is the only piece of the story that we can explain. Without combining the choruses of the songs we would had never come to this.